Steam stop-valve



NITED TATES ATENT FFICE.

JAMES H. BLESSING, OF ALBANY, NEW YORK.

STEAM STO P-VALV E.

SPECIFICATION forming part of Letters Patent No. 451,848, dated May 5, 1891.

Application filed August 1, 1888.

T0 wZZ whom it may concern.-

Be it known that I, JAMES H. BLEssING, of the city and county of Albany, in the State of New York, a citizen of the United States, have invented new and useful Improvements in Steam Stop-Valves, of which the following is a specification.

This invention relates to improvements in stop-valves for use in steam-pipesin which a right-angle bend or elbow is formed; and the object of my invention is to provide a simple and eflicient valve that will form the bend or elbow in the steam-pipe. -This object I attain by the mechanism illustrated in the accompanying drawings, which is herein referred to and forms part of this specification, and in which- Figure 1 is a side elevation of my stopvalve. Fig. 2 is a section taken on the line X X on Fig. 3, showing the valve in its closed condition. Fig. 3 is a vertical section taken at the line Y Y on Fig. 1, showing the valve in its opened condition, with the close end of the seat-casting removed therefrom. liig. t is a horizontal section of Fig. 3 on the line Z Z. Figs. 5, 6, and 7 are respectively an enlarged plan view, an inverted plan View, and a side elevation of the stem for operating the disk-valve; and Figs. 8 and 9 are respectively an enlarged inverted plan view and a plan view of the disk-valve.

As represented in the drawings, A is the seat-casting, which is preferably made in an approximately hemispherical cup shaped form, withtwo nozzles 1 leading radially therefrom on the same plane but at right angles to each other. A. diametrical partition 2 is formed across the hollow of said seat-casting at an angle of about forty-five degrees to the center lines of said nozzles, so as to form a diagonal bridge that will separate the openings through the nozzles from each other and form two semicircular openings 3, which are cut through the valve-seat. The outer edge of the partition 2 is finished flush to form a level plane with the annular rim of the seatcasting, and thereby a suitable seat is formed for the disk-valve B. A neck 4 is formed on one side of the seat-casting, and said neck is provided with a screw-thread for securing a cylindrical bonnet O to that part of the seatcasting. Said bonnet is chambered for the Serial No. 281,628- (No model.)

purpose of containing the valve B and the stem D, by which said valve is operated. The valve Bis made in the form of a recessed disk of the same diameter of the valve-seat of the seat-casting, and is provided on its lower side with two semi-cylindrical chambers 6, which are formed by'the cylindrical rim 7 and a diametrical partition'S. Said chambers correspond in size and shape to the openings 3 in the seat-casting, so that when the valve B is fixed in position where its partition 8 will coincide with the partition 2 of the seat-casting all communication be tween the openings through the nozzles of said seat-casting will be shut off. A stop-pin 9 is removably inserted in said valve in a position where, when the valve is moved a quarter-turn in either direction, said pin Will be brought into contact with one side of the partition 2 of the seat-casting, and thereby prevent the further movement ofthe valve in that direction. The outer face of the valve 13 is provided with a central seat, preferably formed by an annular flange 10, and oppositely-located radial depressions formed by pat allel snugs 11 for the reception of a stem D, by which said valve is operated. The stem D is made with a cylindrical body 12, which is provided with a circumferential flange 13, having lugs 14, which are fitted to engage between the snugs 11, while the inner end of the body 12 engages in the central seat of said valve. The body of said stem is fitted to turnin a bored neck 15, so as to rotate easily therein, and said body is formed with a chamber 16, which contains a spring 17, which eX- erts its pressure to force the valve B down to its seat and at the same time to force the stem D outwardly. In the flange 13 an annular packing may be inserted to bear against a faced seat 18 at the top of the chamber in the bonnet 0, whereby a steam-tight joint can be obtained with the seat 18, the spring 17 forcing the flange 13 or the packing therein into close contact with said seat for that purpose. An opening 21 is made in the valve B to lead from the chamber of said valve that connects directly with that chamber of the seat-casti ng, into which the steam-supply pipe leads, and by reason of the opening 21 the steam-pressure is virtually balanced on both sides of the valve B, so that the latter will be pressed against its seat by the power of the spring 17 alone. A projecting end 22 of the stem D, which extends through the bonnet C, is fitted to receive a wrench or other implement for turning the valve B from the exterior of the device.

\Vhen this valve is applied to use, the axis of the stem D should lie in a horizontal position with one of the nozzles 1 ranged on a horizontal plane and the other ranged on a vertical plane. When so applied, so long as the valve B is turned to open a free circulation of steam through the device, the full opening of the connecting-pipes will remain unobstructed to carry off all water of condensation that may flow in said pipes. It should be understood that either one of the nozzles 1 can be arranged in a horizontal po sition, the other ranging in a vertical position, and which shall be the horizontal and which the vertical nozzle will be dependent on the nature of the work in hand, as it will readily be seen that this device can be interchangeably used in either position; but care should be taken that the valve B is so set that the opening 21 will come directly over that chamber of the seat-casting that the steam-supply pipe leads into.

The operation of my steam-stop valve is as follows: Then the valve B is turned in the position shown in Fig. 2, where its partition 8 is ranged coincidently with the partition 2 of the seat-castin g A, the passage-way through the device will be closed. On turning the valve B one-fourth of a revolution a free opening through the device will be established, and then the steam which will enter the chamber of the seat-casing A at its inlet side will pass into the two chambers 6 in the valve B, then passing over the outer edge of the partition 2, as indicated by arrows on Fig. 3, into the chamber at the outlet side of the seat-casting A, and thence out of the outlet-pipe.

This valve is approximately frictionless, and in it the pressures are so nearly balanced that it can be operated with a trifling expenditure of power, and with but little, if any, wearing away of the parts.

I claim as my invention- In a steam stop-valve, the combination, with a seat-casting A, provided with two nozzles 1, which range on a plane that is parallel with the valve-seat of said casting, the latter having a diametrical partition 2, which forms a bar to a direct communication between said nozzles through said seat-casting, and a bonnet C, which forms a cover to the valve-seat of said seat-casting, of a recessed circular valve B, provided with a diametrical partition 8, which divides the recessed side of said valve into two like chambers G, which coincide with the openings in the valve-seat of said seat-casting, one of said chambers being provided with an opening 21, which leads into the space between the outer side of said valve and the bonnet, a valve-stem D, which is separable from said valve, and a spring 17 contained in said stem and fitted to bear upon said valve, as and for the purpose herein specified.

JAMES H. BLESSING.

\Vitnesses:

VM. H. Low, XVM. F. \VHEELooK. 

